Deoxygenation of structurally diverse sulfoxides including dialkyl, diaryl, arylalkyl and allyl sulfoxides to the corresponding sulfides were carried out using a NaI/silica sulfuric acid reducing system at room temperature in poly ethylene glycol (PEG-200) in excellent yields.
Modulation of photochemical oxidation of thioethers to sulfoxides or sulfones using an aromatic ketone as the photocatalyst
作者:Bin Zhao、Gerald B. Hammond、Bo Xu
DOI:10.1016/j.tetlet.2021.153376
日期:2021.10
We have developed an eco-friendly and chemo-selective photocatalytic synthesis of sulfoxides or sulfones via oxidation of sulfides (thioethers) at ambient temperature using air or O2 as the oxidant. An inexpensive thioxanthone was used as the photocatalyst. Our method offers excellent chemical yields and good functional group tolerance. The hydrogen bonding between hexafluoro-2-propanol (HFIP) and
我们开发了一种环保且化学选择性的光催化合成亚砜或砜,通过在环境温度下使用空气或 O 2作为氧化剂氧化硫化物(硫醚)。廉价的噻吨酮被用作光催化剂。我们的方法提供了出色的化学产率和良好的官能团耐受性。六氟-2-丙醇 (HFIP) 和亚砜之间的氢键可能在最大限度地减少亚砜的过度氧化方面发挥重要作用。
Further functional group oxidations using sodium perborate
作者:Alexander McKillop、Duncan Kemp
DOI:10.1016/s0040-4020(01)81008-5
日期:1989.1
Sodiumperborate in acetic acid is an effective reagent for the oxidation of aromatic aldehydes to carboxylic acids, iodoarenes to (diacetoxyiodo)arenes, azines to -oxides, and various types of sulphur heterocycles to ,-dioxides. Nitriles are unaffected by the reagent in acetic acid, but undergo smooth hydration to amides when aqueous methanol is employed as solvent.
Synthesis of 1,2-Dioxetanes as Thermochemiluminescent Labels for Ultrasensitive Bioassays: Rational Prediction of Olefin Photooxygenation Outcome by Using a Chemometric Approach
作者:Luca A. Andronico、Arianna Quintavalla、Marco Lombardo、Mara Mirasoli、Massimo Guardigli、Claudio Trombini、Aldo Roda
DOI:10.1002/chem.201603765
日期:2016.12.12
assays, has prompted the design and synthesis of a small library of more than 30 olefins to be subjected to photooxygenation, with the aim of obtaining new 1,2‐dioxetane‐based TCL labels with optimized properties. Fluorine atoms on the acridan system remarkably stabilize 1,2‐dioxetanes when they are located in the 3‐ and/or 6‐position (4 h and 4 i). On the other hand, 2,7‐difluorinated acridan dioxetane
Oxidation of Sulfides with Pyridinium Tribromide in the Presence of Hydrated Silica Gel
作者:Mohammed Hashmat Ali、Susan Stricklin
DOI:10.1080/00397910600619044
日期:2006.7
Abstract A variety of sulfides have been oxidized to sulfoxides utilizing pyridinium tribromide in the presence of hydrated silica gel in a non‐aqueous media. A combination of pyridinium tribromide and hydrated silica gel releases molecular bromine slowly in the reaction, affecting the oxidation. Hydrated silica gel also promotes decomposition of the bromosulfonium intermediate to the product. This